"Mrs O: The Face of Fashion Democracy", published by Hachette, celebrates the US First Lady's closet from the campaign trail to the White House.
The tome glances at the mum-of-two's designer dresses to affordable brands with more than 120 pictures, reports the Telegraph.
It also features interviews from some of Michelle's favourite designers, such as Isabel Toledo, Jason Wu, Michael Kors, Maria Pinto and Isaac Mizrahi.
Mary Tomer, 28, who works in advertising for Bartle Bogle Hegarty in New York, said, "I was captivated by this very dynamic professional woman who was confident wearing such striking feminine clothes.
"She was just as happy wearing off-the-rack outfits for 150 dollars as she was choosing interesting young designers in high fashion. It was such a change for a woman in politics where if you think of style at all, it's all boxy suits."
Simon Doonan, the British creative director of Barneys, the chic New York clothing store Barneys, also praised Michelle, often dubbed the First Lady of Fashion, saying. "Mrs Obama has a nuanced but creative style of dressing.
"She is a connoisseur who knows how to go beyond a purely conventional approach and inject her style with a dash of idiosyncracy. Nothing extreme, always appropriate, but never boring or conventional."